CN105281038A - Double-frequency antenna - Google Patents
Double-frequency antenna Download PDFInfo
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- CN105281038A CN105281038A CN201410352472.3A CN201410352472A CN105281038A CN 105281038 A CN105281038 A CN 105281038A CN 201410352472 A CN201410352472 A CN 201410352472A CN 105281038 A CN105281038 A CN 105281038A
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Abstract
The invention discloses a double-frequency antenna comprising a grounding element, a radiation element, and at least one grooved hole. The radiation element is provided with a bent part so that a first radiation portion and a second radiation portion are formed. The first radiation portion is provided with a feed point adjacent to the grounding element. The width of the first radiation portion is gradually increased along the direction far from the grounding element. The orthographic projection of the second radiation portion is formed on the grounding element. The at least grooved hole passes through the second radiation portion.
Description
Technical field
The present invention relates to a kind of antenna, and particularly relate to a kind of dual-band antenna.
Background technology
With regard to advanced television standard committee (AdvancedTelevisionSystemsCommittee, be called for short ATSC) substandard digital television system, the transmitting antenna of its transmission end is the electromagnetic wave transmitting perpendicular polarization (verticalpolarization), and the concentration of energy of transmitting antenna is on horizontal section.Therefore, in order to obtain good reception, the reception antenna of receiving terminal also must adopt the load mode of perpendicular polarization, and the energy of reception antenna also must concentrate on horizontal section.
Generally speaking, as shown in Figure 1, traditional dipole antenna (dipoleantenna) 110 and unipole antenna (monopoleantenna) 120 have perpendicular polarization and the concentration of energy radiation characteristic at horizontal section, therefore can be applicable in digital television system.But, traditional dipole antenna 110 cannot provide good dual frequency operation with unipole antenna 120, therefore cannot support the superfrequency (VeryHighFrequency that digital television system uses simultaneously, be called for short VHF) frequency range and hyperfrequency (UltraHighFrequency, abbreviation UHF) frequency range.
Summary of the invention
The object of the present invention is to provide a kind of dual-band antenna, can dual frequency operation be reached, and also there is perpendicular polarization and the concentration of energy radiation characteristic at horizontal section.
For reaching above-mentioned purpose, dual-band antenna of the present invention, comprises earth element, radiant element and at least one grooved bore.Radiant element has a bending (bending) to form the first Department of Radiation and the second Department of Radiation.Wherein, the first Department of Radiation has the load point of contiguous earth element.In addition, the width of the first Department of Radiation sequentially increases progressively along the direction away from earth element.Second Department of Radiation forms an orthographic projection on earth element.Described at least one grooved bore runs through the second Department of Radiation.
In one embodiment of this invention, the first above-mentioned Department of Radiation is symmetrical in the first datum line.Earth element is symmetrical in the second datum line.In addition, the first datum line and the second datum line intersect each other and form a cross-point.
In one embodiment of this invention, above-mentioned dual-band antenna also comprises the first extending element.First extending element is electrically connected the first Department of Radiation, and intersects at the first datum line with the first Department of Radiation.In addition, the width of the first extending element sequentially increases progressively along the direction away from earth element.
Based on above-mentioned, the radiant element in dual-band antenna of the present invention utilizes one to be bent to form the first Department of Radiation and the second Department of Radiation.In addition, the first Department of Radiation has shape wide at the top and narrow at the bottom, and the second Department of Radiation forms sinuous (meandering) structure by least one grooved bore.Thus, dual-band antenna can reach dual frequency operation, and also have perpendicular polarization and the concentration of energy radiation characteristic at horizontal section.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and the accompanying drawing appended by coordinating is described in detail below.
Accompanying drawing explanation
Fig. 1 is traditional dipole antenna and the schematic diagram of unipole antenna;
Fig. 2 is the schematic diagram of the dual-band antenna of one embodiment of the invention;
Fig. 3 is the schematic diagram of the dual-band antenna of another embodiment of the present invention;
Fig. 4 is the generalized section of the dual-band antenna of Fig. 3;
Fig. 5 is the schematic diagram of the dual-band antenna of further embodiment of this invention;
Fig. 6 is the generalized section of the dual-band antenna of Fig. 5;
Fig. 7 is the schematic diagram of the dual-band antenna of another embodiment of the present invention;
Fig. 8 is the schematic diagram of the dual-band antenna of further embodiment of this invention;
The dual-band antenna that Fig. 9 A and Fig. 9 B is respectively one embodiment of the invention operates in the field pattern figure of the second frequency range;
The dual-band antenna that Figure 10 A and Figure 10 B is respectively one embodiment of the invention operates in the field pattern figure of the first frequency range;
Figure 11 is the schematic diagram of the dual-band antenna of another embodiment of the present invention;
Figure 12 is the generalized section of the dual-band antenna of Figure 11.
Symbol description
110: traditional dipole antenna
120: traditional unipole antenna
200,300,500,700,800,1100: dual-band antenna
210: earth element
220,1110: radiant element
231 ~ 233: grooved bore
240,1120: the first Departments of Radiation
241: minor face
242: long limit
243: first side
244: second side
250: the second Departments of Radiation
251: the first edges
252: the second edges
253: the three edges
201: bending
θ 1: angle
FP: load point
310,510: the first extending elements
520: the second extending elements
710,810: locked groove hole
θ 2: predetermined angle
Embodiment
Fig. 2 is the schematic diagram of the dual-band antenna according to one embodiment of the invention.As shown in Figure 2, dual-band antenna 200 comprises earth element 210, radiant element 220 and multiple grooved bore 231 ~ 233.Wherein, radiant element 220 has a bending 201 to form the first Department of Radiation 240 and the second Department of Radiation 250.
First Department of Radiation 240 stand on earth element 210, and the second Department of Radiation 250 forms an orthographic projection on earth element 210.From another angle, between the first Department of Radiation 240 and the second Department of Radiation 250, there is an angle theta 1, and angle theta 1 is greater than 0 degree and is less than 180 degree.For example, in Fig. 2 embodiment, the angle theta 1 between the first Department of Radiation 240 and the second Department of Radiation 250 is 90 degree, and then causes radiant element 220 to have a L-type structure.
First Department of Radiation 240 has the load point FP of contiguous earth element 210.In addition, the width of the first Department of Radiation 240 sequentially increases progressively along the direction (such as, Z-direction) away from earth element 210.That is the first Department of Radiation 240 has shape wide at the top and narrow at the bottom.Therefore, the shape of the first Department of Radiation 240 can be such as butterfly knot shape (bowtie-shaped) or trapezoidal.Grooved bore 231 ~ 233 runs through the second Department of Radiation 250.In addition, the grooved bore 231 ~ 233 in the second Department of Radiation 250 is crisscross arranged, and then causes the second Department of Radiation 250 to have sinuous (meandering) structure.Thus, the second Department of Radiation 250 can increase the effective length (effectivelength) of dual-band antenna 200.
Operationally, dual-band antenna 200 receives a FD feed by load point FP.Under the exciting of FD feed, dual-band antenna 200 operates in the first frequency range (such as, uhf band) by the first Department of Radiation 240.In addition, the second Department of Radiation 250 can extend the effective length of dual-band antenna 200, and then causes dual-band antenna 200 to be also operable in the second frequency range (such as, VHF frequency range).In addition, grooved bore 231 ~ 233 on the shape wide at the top and narrow at the bottom of bending 201, first Department of Radiation 240 of radiant element 220 and the second Department of Radiation 250 all will contribute to the microminiaturization of dual-band antenna 200, and then causes dual-band antenna 200 to have small and exquisite size.
Moreover dual-band antenna 200 is essentially a unipole antenna (monopoleantenna).Therefore, dual-band antenna 200, except reaching except dual frequency operation, also has perpendicular polarization and the concentration of energy radiation characteristic at horizontal section.In addition, dual-band antenna 200 has more the radiation pattern being similar to equal tropism (omni-directional) on horizontal section, and then causes dual-band antenna 200 can more meet the demand in practical application.
Further, the first Department of Radiation 240 has minor face 241, a first side, long limit 242, one 243 and a second side 244.Wherein, the minor face 241 of the first Department of Radiation 240 has load point FP.The long limit 242 of the first Department of Radiation 240 is electrically connected the second Department of Radiation 250.The first side 243 of the first Department of Radiation 240 and second side 244 are in order to define the width of the first Department of Radiation 240.
Second Department of Radiation 250 has one first edge, edge 251,1 second 252 and one the 3rd edge 253.Wherein, the second edge 252 and the 3rd edge 253 are adjacent to the first edge 251, and the first edge 251 is electrically connected the first Department of Radiation 240.In addition, grooved bore 231 is positioned at the second edge 252 with the opening of grooved bore 233, and the opening of grooved bore 232 is positioned at the 3rd edge 253.In other words, the grooved bore 231 ~ 233 in the second Department of Radiation 250 is crisscross arranged, and the opening of two adjacent grooved bore is separately positioned on relative two edges 252 and 253, and then causes the second Department of Radiation 250 to form (meandering) structure of wriggling.
Although Fig. 2 embodiment lists the enforcement kenel of the grooved bore in the second Department of Radiation 250, it is also not used to limit the present invention.For example, in another embodiment, dual-band antenna 200 only comprises single grooved bore (such as, the one of grooved bore 231 ~ 233), and dual-band antenna 200 utilizes single grooved bore to be formed the serpentine structure of the second Department of Radiation 250.In addition, in another embodiment, dual-band antenna 200 also can be such as comprise two grooved bore (such as, grooved bore 231 and 232).In other words, dual-band antenna 200 comprises at least one grooved bore, and utilizes described at least one grooved bore to form the serpentine structure of the second Department of Radiation 250.
Continue referring to Fig. 2.First Department of Radiation 240 is symmetrical in the first datum line (such as, Z axis), and earth element 210 is symmetrical in the second datum line (such as, X-axis).In addition, the first datum line and the second datum line intersect each other and form a cross-point (such as, the initial point of reference axis).It is worth mentioning that, this area has knows that the knowledgeable can adjust the position of the cross-point of two datum lines according to design usually, and increases the effective length of dual-band antenna 200 thus.For example, in Fig. 2 embodiment, an edge of the contiguous earth element 210 of cross-point of the first datum line and the second datum line.Thus, the effective length of dual-band antenna 200 can be increased further, and then promote the radiation characteristic of dual-band antenna 200 in the second frequency range (such as, VHF frequency range).
It should be noted that above-mentioned dual-band antenna 200 also can utilize extending element to improve the symmetry of its radiation pattern, and then cause radiation pattern more to level off to the radiation pattern of equal tropism.For example, Fig. 3 is the schematic diagram of the dual-band antenna according to another embodiment of the present invention, and Fig. 4 is the generalized section of the dual-band antenna of Fig. 3.Wherein, the dual-band antenna 300 cited by Fig. 3-Fig. 4 is similar to the dual-band antenna 200 cited by Fig. 2, and both main difference parts are, the dual-band antenna 300 of Fig. 3-Fig. 4 also comprises the first extending element 310.
Specifically, the first extending element 310 is electrically connected the first Department of Radiation 240.In addition, the first Department of Radiation 240 is symmetrical in the first datum line (such as, Z axis), and the first extending element 310 and the first Department of Radiation 240 intersect at the first datum line (such as, Z axis).Moreover the width of the first extending element 310 sequentially increases progressively along the direction (such as, Z-direction) away from earth element 210.Thus, dual-band antenna 300 can utilize the first extending element 310 to promote the symmetry of radiation pattern.Particularly, dual-band antenna 300 operate in the first frequency range (such as, uhf band) radiation pattern can in response to the setting of the first extending element 310 the equal tropism's radiation pattern that more levels off to.Thin portion configuration as each element in Fig. 3-Fig. 4 example comprises in the above-described embodiments with operation, therefore does not repeat them here.
Fig. 5 is the schematic diagram of the dual-band antenna according to further embodiment of this invention, and Fig. 6 is the generalized section of the dual-band antenna of Fig. 5.Wherein, the dual-band antenna 500 cited by Fig. 5-Fig. 6 is similar to the dual-band antenna 200 cited by Fig. 2, and both main difference parts are, the dual-band antenna 500 of Fig. 5-Fig. 6 also comprises the first extending element 510 and the second extending element 520.
Specifically, the first extending element 510 is electrically connected the first Department of Radiation 240 with the second extending element 520, and the first extending element 510 and the second extending element 520 are positioned at the both sides of the first Department of Radiation 240.In addition, the first Department of Radiation 240 is symmetrical in the first datum line (such as, Z axis), and the first extending element 510, second extending element 520 and the first Department of Radiation 240 intersect at the first datum line (such as, Z axis).Thus, dual-band antenna 500 can utilize the first extending element 510 and the second extending element 520 to promote the symmetry of radiation pattern.Thin portion configuration as each element in Fig. 5-Fig. 6 example comprises in the above-described embodiments with operation, therefore does not repeat them here.
It should be noted that above-mentioned dual-band antenna 200,300 and 500 also can arrange locked groove hole on earth element 210, to reduce the height of antenna further or to promote the radiation efficiency of antenna.For example, Fig. 7 is the schematic diagram of the dual-band antenna according to another embodiment of the present invention.Wherein, the dual-band antenna 700 cited by Fig. 7 is similar to the dual-band antenna 300 cited by Fig. 3, and both main difference parts are, the dual-band antenna 700 of Fig. 7 also comprises locked groove hole 710.
Specifically, earth element 210 is run through in locked groove hole 710.In addition, earth element 210 and locked groove hole 710 are all symmetrical in the second datum line (such as, X-axis).Operationally, locked groove hole 710 can change the reflected phase will of electromagnetic wave on earth element 210, and then causes reflected phase will to be less than 180 degree.Thus, the height of dual-band antenna 700 can be reduced or improve the radiation efficiency of dual-band antenna 700.Particularly, when the height of dual-band antenna 700 is fixing, arranging of locked groove hole 710 further can increase the radiation efficiency that dual-band antenna 700 operates in the second frequency range (such as, VHF frequency range).
Although Fig. 7 embodiment lists the enforcement kenel in the locked groove hole 710 in earth element 210, it is also not used to limit the present invention.This area has knows that the knowledgeable can according to design to be symmetrical in the geometric figure of the second datum line to be grounded the locked groove hole 710 in element 210 usually.For example, Fig. 8 is the schematic diagram of the dual-band antenna according to further embodiment of this invention.Compared to Fig. 3 embodiment, the dual-band antenna 800 of Fig. 8 also comprises locked groove hole 810.Wherein, earth element 210 is run through in locked groove hole 810, and locked groove hole 810 is symmetrical in the second datum line (such as, X-axis).In addition, the length in locked groove hole 810, that is the distance between two ends, locked groove hole 810 are 1/2 wavelength of the centre frequency of the second frequency range (such as, VHF frequency range).
Generally speaking, the dual-band antenna 700 of Fig. 7 can utilize the first extending element 310 to promote the symmetry of radiation pattern, and promotes radiation efficiency further by the locked groove hole 710 on earth element 210.For example, Fig. 9 A and Fig. 9 B dual-band antenna be respectively according to one embodiment of the invention operates in the field pattern figure of the second frequency range.Wherein, Fig. 9 A and Fig. 9 B is respectively in VHF frequency range, such as: frequency of operation 0.174GHz, 0.195GHz and 0.216GHz, and the radiation pattern of dual-band antenna 700 on horizontal section and plumb cut.
In addition, Figure 10 A and Figure 10 B dual-band antenna be respectively according to one embodiment of the invention operates in the field pattern figure of the first frequency range.Wherein, Figure 10 A and Figure 10 B is respectively in uhf band, such as: frequency of operation 0.47GHz, 0.546GHz, 0.622GHz and 0.698GHz, and the radiation pattern of dual-band antenna 700 on horizontal section and plumb cut.As shown in Fig. 9 A, Fig. 9 B, Figure 10 A and Figure 10 B, in VHF frequency range and uhf band, the energy of dual-band antenna 700 all concentrates on horizontal section, and has good equal tropism's radiation pattern.Thin portion configuration as each element in Fig. 7-Fig. 8 example is included in the various embodiments described above with operation, therefore does not repeat them here.
On the other hand, in order to meet the demand of the appearance design of product in practical application, the radiant element 220 in above-mentioned dual-band antenna 200,300,500,700 and 800 also can utilize the mode of inclination to be fixed on the top of earth element 210.For example, Figure 11 is the schematic diagram of the dual-band antenna according to another embodiment of the present invention, and Figure 12 is the generalized section of the dual-band antenna of Figure 11.Wherein, dual-band antenna 1100 cited by Figure 11-Figure 12 is similar to the dual-band antenna 700 cited by Fig. 7, and both main difference parts are, radiant element 1110 in the dual-band antenna 1100 of Figure 11-Figure 12 comprises the first Department of Radiation 1120 and the second Department of Radiation 250, and the first Department of Radiation 1120 to tilt a predetermined angle θ 2 relative to Z axis.Wherein, described predetermined angle θ 2 can be such as 5 degree.Thus, the outward appearance of dual-band antenna 1100 can be caused to have more smooth curvilinear structures.
In sum, the radiant element in dual-band antenna of the present invention utilizes one to be bent to form the first Department of Radiation and the second Department of Radiation.In addition, the first Department of Radiation has shape wide at the top and narrow at the bottom, and the second Department of Radiation forms a serpentine structure by least one grooved bore.Thus, dual-band antenna can reach dual frequency operation, and also have perpendicular polarization and the concentration of energy radiation characteristic at horizontal section.In addition, the grooved bore on the bending of radiant element, the shape wide at the top and narrow at the bottom of the first Department of Radiation and the second Department of Radiation also contributes to the microminiaturization of dual-band antenna.Moreover dual-band antenna also can utilize extending element to promote the symmetry of radiation pattern, and also promotes radiation efficiency further by the locked groove hole on earth element.
Although disclose the present invention in conjunction with above embodiment; but itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; a little change and retouching can be done, therefore being as the criterion of should defining with the claim of enclosing of protection scope of the present invention.
Claims (11)
1. a dual-band antenna, comprising:
Earth element;
Radiant element, there is a bending to form the first Department of Radiation and the second Department of Radiation, wherein this first Department of Radiation has the load point of this earth element contiguous, the width of this first Department of Radiation sequentially increases progressively along the direction away from this earth element, and this second Department of Radiation forms an orthographic projection on this earth element; And
At least one grooved bore, runs through this second Department of Radiation.
2. dual-band antenna as claimed in claim 1, wherein this first Department of Radiation has minor face, long limit, first side and second side, this minor face has this load point, and this long limit is electrically connected this second Department of Radiation, and this first side and this second side are in order to define the width of this first Department of Radiation.
3. dual-band antenna as claimed in claim 1, wherein this second Department of Radiation has the first edge, the second edge and the 3rd edge, this first edge electric connects this first Department of Radiation, and this second edge and the 3rd edge are adjacent to this first edge, and this at least one grooved bore comprises:
First grooved bore, runs through this second Department of Radiation, and the opening of this first grooved bore is positioned at this second edge.
4. dual-band antenna as claimed in claim 3, wherein this at least one grooved bore also comprises:
Second grooved bore, runs through this second Department of Radiation, and the opening of this second grooved bore is positioned at the 3rd edge.
5. dual-band antenna as claimed in claim 1, wherein this first Department of Radiation is symmetrical in one first datum line, and this earth element is symmetrical in one second datum line, and this first datum line and this second datum line intersect each other and form a cross-point.
6. dual-band antenna as claimed in claim 5, wherein an edge of this cross-point this earth element contiguous.
7. dual-band antenna as claimed in claim 5, also comprises:
First extending element, is electrically connected this first Department of Radiation, and intersects at this first datum line with this first Department of Radiation, and wherein the width of this first extending element sequentially increases progressively along the direction away from this earth element.
8. dual-band antenna as claimed in claim 7, also comprises:
Second extending element, be electrically connected this first Department of Radiation, and intersect at this first datum line with this first Department of Radiation, wherein this second extending element and this first extending element are positioned at the both sides of this first Department of Radiation, and the width of this second extending element sequentially increases progressively along the direction away from this earth element.
9. dual-band antenna as claimed in claim 5, also comprises:
Locked groove hole, runs through this earth element, and this locked groove hole is symmetrical in this second datum line.
10. dual-band antenna as claimed in claim 9, wherein this dual-band antenna operates in one first frequency range and one second frequency range, and this first frequency range is higher than this second frequency range, and the length in this locked groove hole is 1/2 wavelength of the centre frequency of this second frequency range.
11. dual-band antennas as claimed in claim 1, wherein the shape of this first Department of Radiation is butterfly knot shape or trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410352472.3A CN105281038B (en) | 2014-07-23 | 2014-07-23 | Dual-band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410352472.3A CN105281038B (en) | 2014-07-23 | 2014-07-23 | Dual-band antenna |
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| Publication Number | Publication Date |
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| CN105281038A true CN105281038A (en) | 2016-01-27 |
| CN105281038B CN105281038B (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410352472.3A Active CN105281038B (en) | 2014-07-23 | 2014-07-23 | Dual-band antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350308A (en) * | 2019-07-15 | 2019-10-18 | 重庆大学 | A kind of ultra wide band low section vertical depolarized omnidirectional antenna and its trap design |
| CN111430931A (en) * | 2020-04-01 | 2020-07-17 | 武汉虹信通信技术有限责任公司 | Radiation sheet for broadband antenna and broadband antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262791A (en) * | 1997-07-09 | 2000-08-09 | 奥根公司 | Trap microstrip plane antenna |
| TWM391735U (en) * | 2010-06-25 | 2010-11-01 | Cheng Uei Prec Ind Co Ltd | Dual-band antenna |
| TW201201451A (en) * | 2010-06-23 | 2012-01-01 | Quanta Comp Inc | Dual band antenna |
-
2014
- 2014-07-23 CN CN201410352472.3A patent/CN105281038B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262791A (en) * | 1997-07-09 | 2000-08-09 | 奥根公司 | Trap microstrip plane antenna |
| TW201201451A (en) * | 2010-06-23 | 2012-01-01 | Quanta Comp Inc | Dual band antenna |
| TWM391735U (en) * | 2010-06-25 | 2010-11-01 | Cheng Uei Prec Ind Co Ltd | Dual-band antenna |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350308A (en) * | 2019-07-15 | 2019-10-18 | 重庆大学 | A kind of ultra wide band low section vertical depolarized omnidirectional antenna and its trap design |
| CN110350308B (en) * | 2019-07-15 | 2020-12-18 | 重庆大学 | Ultra-wideband low-profile vertical polarization omnidirectional antenna and trapped wave design method thereof |
| CN111430931A (en) * | 2020-04-01 | 2020-07-17 | 武汉虹信通信技术有限责任公司 | Radiation sheet for broadband antenna and broadband antenna |
| CN111430931B (en) * | 2020-04-01 | 2022-01-11 | 武汉虹信科技发展有限责任公司 | Radiation sheet for broadband antenna and broadband antenna |
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| Publication number | Publication date |
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| CN105281038B (en) | 2018-01-30 |
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